Question

If 10% of a number is 16, find 5% of that number.

Answer 1

`\text{If the number is x,}\\\\~~~~10\% \cdot x = 16\\\\\implies (10x)/(100) = 16\\\\\implies \frac x{10} = 16\\\\\implies x = 160\\\\\text{Hence,}~ 5\% \text{ of}~ 160 = (5 * 160)/(100)=8`